Rubber Transfer Molding

Rubber Transfer Molding

The rubber transfer molding process is ideal for the production of solid rubber parts, rubber parts with inserts, and parts that require bonding rubber to metal. Rubber transfer molding combines the advantages of injection rubber molding with the ease of compression molding. This process is most often used for forming rubber products that require:

• Exact positioning
• Bonding rubber to fragile metal parts – such as wire
• Mold designs that contain multiple cavities and can trap air
• Intricate parts with lower volume requirements

Qualiform’s Rubber Transfer Molding Process

Our process of transfer molding involves pushing unvulcanized rubber through sprues into a heated mold. Similar to compression molding, transfer molding requires raw material preparation into pellets and/or pre-forms.

Rather than placing the preform in the mold cavity, the rubber pre-form is placed in a chamber “pot” at the top of the mold then placed in a press. In the pot, the material is compressed by a heated plunger and transferred through sprues into the cavity below.  During this, the plunger is kept in place until the preform takes on the shape of the mold and the rubber is vulcanized.  Once the part cures, hardens, cools, it is then ejected. Any excess cured rubber left in the pot is removed and the mold cavities are cleaned for the next molding cycle to begin.

Transfer Molding for Rubber to Metal Bonding

Transfer molding is an important part of the rubber to metal bonding process or over molding, the components are loaded into a heated mold either by hand or using a loading fixture.  Material is then loaded into the well pot of the transfer mold.  Once the mold closes, the rubber is heated and then transferred through the runner. The gate sprues into the mold cavities and around the metal insert.  With the pressure and elevated temperatures, the rubber cures and vulcanizes, allowing the parts to be removed.

The rubber transfer mold consists of a piston, well pot, sprue plate, cavity plate, and a base plate with a knock-out system used to eject the parts after molding.

Qualiform Rubber Molding Information

Qualiform is one of the top US companies in the rubber molding industry. We create custom products using unique designs and special compounds. Our experience in rubber molding and rubber-to-metal bonding is unparalleled, giving us the problem-solving abilities to tackle specific molding challenges.

Certified Rubber Molding Company

Qualiform is a certified ISO 9001:2015 company. We provide our customers with excellent service and the highest quality custom rubber-molded products, to ensure all of their specific needs are met. Contact Qualiform Rubber Molding if you are in need of any assistance with product development. Our expertise includes a variety of molding services including, injection molding, compression molding, transfer molding, and rubber-to-metal bonding.

Our expert staff will be available to assist you throughout the entire design and development process. We will work diligently to ensure each product meets your needs and specifications. At each step of your product’s development, our staff will be by your side ensuring the materials and product quality are to your satisfaction.

Qualiform Quality Assurance Program

Qualiform Rubber Molding is an ISO 9001:2015, and we are dedicated to employing the most effective quality assurance program. Every aspect of our molding process is overseen, evaluated, and documented by this program. This allows us to comply with customer requirements and ensure satisfaction with each product and service we offer.

Competitive Pricing for Rubber Transfer Molding

Qualiform evaluates every aspect of part production to maintain competitive pricing. We examine each product to create the best solutions and prices through R&D, design, engineering, or manufacturing.

Experienced Work Force

With 130 years of experience in all areas of the rubber molding industry, our leadership team is capable of providing the best service possible. At Qualiform, we consider each employee an extremely valuable asset. Therefore, we invest in the skill sets and expertise of our employees. This reinforces top quality products, employee leadership, and job performance.

Customer Service

Here at Qualiform, we provide customers with dependable and considerate communication. We follow-up with all our customers to make certain they know the exact details of each step of the production process.